ZZ427 480HP Big Block CRATE ENGINE -19331572

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93.22 (cm)
91.44 (cm)
104.65 (cm)
Current Stock:

The legendary L88 was the pinnacle of Chevy’s Big-Block power, and the
ZZ427/480 crate engine carries that spirit with modern updates that enhance
performance, making it the ultimate expression of Chevy heritage for your
classic Corvette.
Like the original, our ZZ427/480 combines a sturdy iron cylinder block with
lightweight aluminum cylinder heads and a single four-barrel carburetor.
That raspy crate engine was rated at 430 horsepower, although the figure was
generally thought to be on the conservative side. We’ve upgraded the camshaft
from the original’s mechanical flat-tappet design to a smoother hydraulic roller,
which delivers great drivability characteristics and a broader rev range. A 10.1:1
compression ratio means it will perform great on pump gas.

Additional Features Include
* 4.250 in. bore with 3.750 in stroke
* Cast iron block with 4-bolt main caps
* Forged steel crankshaft
* Forged steel connecting rods
* Forged Aluminum Pistons
* Hydraulic roller camshaft
* Valve lift .527 in. intake/.544 in. exhaust
* Duration (.050 in) 224 intake/ 234 exhaust
* Aluminum oval port heads with 110 cc chambers
* 2.190 in. intake/1.880 in. exhaust valves
* 10.1:1 compression ratio
* Aluminum 1.7:1 ratio roller rocker arms
* HEI distributor
* 770 cfm carburetor
* Aluminum short water pump
* Ignition timing base 10 degrees BTDC, 36 degrees total
* 6,400 maximum recommended rpm